package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService  {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;
    @Autowired
    private CategoryService categoryService;
    /**
     *
     * @param id
     */
     @Override
     public void remove(Long id){
         LambdaQueryWrapper<Dish> dishqueryWrapper = new LambdaQueryWrapper<>();
         //添加查询条件
         dishqueryWrapper.eq(Dish::getCategoryId,id);
         //查询当前分类是否关联了菜品，如果已经关联，抛出一个业务异常
         int count = dishService.count(dishqueryWrapper);
         if (count > 0){
            throw new CustomException("当前分类下关联了菜品，不能删除");

         }
         //插叙当前分类是否关联了套餐，如果已经关联，爆出一个业务异常
         LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
         //添加查询条件
         queryWrapper.eq(Setmeal::getCategoryId,id);
         int count1 = setmealService.count(queryWrapper);
         if (count1 > 0){
             throw new CustomException("当前分类下关联了菜品，不能删除");
         }
         //正常删除分类
         categoryService.removeById(id);
     }


}
